Charcoal: Cooking the ashwood at high heat in an oxygen free environment exposes its
sequestered carbon. Charcoal connotes ruin, filtration, fuel, and even fertility depending on the context. Reduced to char, the material becomes archival, likely to last thousands of years. A small piece of char becomes a specimen or fossil from an anthropocene tree pandemic. To date two kilns and two retorts have been constructed for the production of ash charcoal.